Micromagnetic analysis of permanent magnet biased narrow track spin-valve heads

Author

Lu, Danzhu ; Zhu, Jian-Gang

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., MN, USA

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

2615

Lastpage

2617

Abstract

We have performed a micromagnetic modeling analysis of an abutted permanent magnet longitudinal biased spin valve head. In this design, the linear dynamic range of the head output is essentially unchanged with decreasing track width down to 0.5 μm. Optimizing sensor height can yield significant signal enhancement. It has been found that the pinning field on the pinned layer of the spin valve structure has to be greater than a critical value, below which the output will decrease rapidly with decreasing the pinning field, while above that the signal output remains essentially unchanged. Well defined cross-track performance is found for this head design

Keywords

magnetic domains; magnetic heads; magnetic multilayers; magnetoresistive devices; permanent magnets; 0.5 micron; MR heads; cross-track performance; head output; linear dynamic range; micromagnetic analysis; narrow track spin-valve heads; permanent magnet bias; pinned layer; pinning field; sensor height; signal enhancement; spin valve structure; track width; Magnetic analysis; Magnetic anisotropy; Magnetic heads; Magnetic shielding; Micromagnetics; Permanent magnets; Perpendicular magnetic anisotropy; Saturation magnetization; Soft magnetic materials; Spin valves;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490070

Filename

490070